Improvement in sewing-machines



E. A. WEEKS.

Sewing Machines.

Patente d April 16,1872.-

UNITED STATES EUGENE A. WEEKS, OF CINCINNATI, OHIO.

IMPROVEMENT IN SEWlNG-MACHINES.

Specification forming part of Letters Patent No. 125,774, dated April16, 1872.

I, EUGENE A. WEEKS, of Cincinnati, Hamilton county, State of Ohio, haveinvented a certain new and useful Improvement in Feed Mechanism forSewing-Machines, of which the following is a Specification:

N atnre and Objects of Invention.

My invention relates to sewing-machines in which the feed-bar is locatedand operated above the fabric to be operated upon; and consists in theprovision of rotating disks or plates below the feed-bar, which resistthe pressure of the feed-bar, between which disks and the feed-bar thefabric to be sewed is located, the disks being adapted to rotate inunison with the forward motion of the feed-bar, and thus enable the barto feed, without slippage, thick, heavy material, such as leather.

Description of the Accompanying Drawing.

Figure 1 is a perspective view of a Davis vertical-feed sewing-machineembodying my invention. Fig. 2-is a plan, showing a plan of the rotaryfeed-disks. Fig. 3 is a cross-section of the rotary disks and feed-bar,showing the fabric in position between the feedbar and rotary disks.

- General Description.

A represents the frame of a Davis sewingmachine, and B the verticalfeed-bar. This bar, as shown, is adapted to press downward upon thegoods, and while so pressing has a forward movement imparted to it,which feeds the fabric the length of a stitch. When this forwardmovement is completed, the bar is elevated so as to be detached from thefabric at the same time that the presser-foot D is forced down to retainthe fabric in position, and when so elevated has a backward movementimparted to it, which carries it to the point necessary to commence thenext feed. In the action or operation of this class ofmachinesheretofore it has been found diflicult to' feed thick material,such as leather, or in fact any fabric calculated to adhere to thetable, owing to the degree of adhesion between the fabric and tablebeing greater than that between the fabric and feed-bar, and resultingin the slippage of the bar over the goods. To remedy this objection andrender this class of machine adapted to operate'freely upon all classesor kinds of material, I attach two disks, 0 0, to the table, the facesof the disks be ing horizontal and in the same plane, the periphery ofeach so closely approaching that of the other as to admit only of thefree operation of the needle E between the disks. The width of thefeed-bar B is sufficient to overlap the disks, as shown in Figs. 1, 2,and 3, so that the cloth or leather to be operated upon may be heldwhile feeding between the feed-bar and the faces of the disks. Both thedisks are journaled, as shown, on studs 0, and they are made preferablywith sleeves c to give considerable depth of bearing on the journals,and thus avoid canting or sticking. The disks are designed to rotatewhen the goods move forward under the feeding action of the feed-bar,and in so rotating enable the feed-bar to carry the goods forward theexact prescribed distance without slip.

Claim.

The combination of the vibrating and reciprocating feed-bar B and disks0 0, when the faces of the disks receive the pressure of the feed, androtate "in unison with the action of the feed-bar, substantially asspecifiied.

In testimony of which invention I hereunto set my hand.

EUGENE A. WEEKS.

Witnesses FRANK MILLWARD, J. L. WARTMANN.

